CN115944969A

CN115944969A - Ultrapure water filtering structure and filtering system

Info

Publication number: CN115944969A
Application number: CN202310001229.6A
Authority: CN
Inventors: 唐叶红; 刘景光; 王延宗; 贺柏林; 褚颖颖
Original assignee: Suzhou Xinneng Environmental Technology Co ltd
Current assignee: Suzhou Xinneng Environmental Technology Co ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-04-11
Anticipated expiration: 2043-01-03
Also published as: ZA202400164B; CN115944969B

Abstract

The embodiment of the application provides an ultrapure water filtration structure and filtration system, relates to ultrapure water filtration technology field. The utility model provides an ultrapure water filtration structure contains inlet tube, drain pipe and disc filter, go up the filter disc cup joint in the pipeline, go up the filter disc top two terminal surfaces all be the toper design, lower filter disc rotate cup joint in the pipeline, just lower filter disc with crisscross setting between the last filter disc, the structure size of lower filter disc is the same completely with last filter disc, utilizes the toper design of the upper and lower terminal surface of last filter disc and lower filter disc, cooperation ramp for disc filter can utilize rivers to drive the ramp and rotate when carrying out the back flush, makes to take place relative rotation change between last filter disc and the lower filter disc then, makes to be located the debris between last filter disc and the lower filter disc and rotates, and the rivers of cooperation back flush make debris more discharge, reduce because of debris cause whole disc filter to take place the probability of jam.

Description

Ultrapure water filtering structure and ultrapure water filtering system

Technical Field

The application relates to an ultrapure water filtration technology field, particularly relates to an ultrapure water filtration structure and a filtration system.

Background

Ultrapure water, also known as UP water, having a resistivity of 18M Ω × cm (25 ℃), is commonly used in the integrated circuit industry for cleaning semiconductor raw materials and utensils used, for producing photolithographic masks, for oxidizing silicon wafers, and for producing other solid-state electronic devices, thick and thin film circuits, printed circuits, vacuum tubes, and the like.

The ultrapure water can be obtained after raw water is subjected to multiple treatments, when the raw water is pretreated, the raw water needs to be primarily filtered by a disc filter to remove suspended matters, particles, colloid and other substances in the raw water, and simultaneously, the turbidity and the chromaticity of the raw water are reduced.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides an ultrapure water filtering structure and an ultrapure water filtering system, the ultrapure water filtering structure and the ultrapure water filtering system utilize the shape design of an upper filter disc and a lower filter disc and are matched with a ramp, so that the disc filter can utilize water flow to drive the ramp to rotate when performing backwashing, then the upper filter disc and the lower filter disc are enabled to rotate relatively, then sundries between the upper filter disc and the lower filter disc are enabled to rotate, and the water flow matched with backwashing is easier to discharge.

The application provides an ultrapure water filtration structure contains inlet tube, drain pipe and disc filter, the intercommunication has a plurality of back flush valves on the inlet tube, and is a plurality of back flush valve communicates in the blow off pipe, the one end intercommunication of drain pipe has the drain valve, disc filter communicate in the drain pipe and with back flush valve one-to-one intercommunication still includes:

the disc filter contains shell, filter core and ramp, the shell respectively with the drain pipe and back flush valve intercommunication, the shell top is provided with the upper cover, cover on and be provided with discharge valve, the filter core contains the pipeline, goes up filter element and lower filter element, the pipeline set up in the shell, be provided with a plurality of through-holes on the pipeline lateral wall, go up the filter element cup joint in the pipeline, it follows to go up the filter element the axial array setting of pipeline, two terminal surfaces all are the toper design at last filter element top bottom, lower filter element rotate cup joint in the pipeline, lower filter element follows the axial array setting of pipeline, just down the filter element with crisscross the setting between the last filter element, the structure size of lower filter element with go up the filter element completely the same, the ramp set up in the shell with between the filter core.

According to this application embodiment's ultrapure water filtration structure, beneficial effect is: the conical design of the upper end face and the lower end face of the upper filter disc and the lower filter disc is utilized, the ramp is matched, when the disc filter performs backwashing, water flow can be utilized to drive the ramp to rotate, then the upper filter disc and the lower filter disc are enabled to rotate relatively, then sundries between the upper filter disc and the lower filter disc are enabled to rotate, the sundries are enabled to be discharged more easily by matching with the backwashing water flow, and the probability that the whole disc filter is blocked due to the sundries is reduced.

In addition, an ultrapure water filtering structure according to the embodiment of the present application also has the following additional technical features:

in some embodiments of the present application, the top end of the housing is hermetically connected to the upper cover in a threaded manner.

In some embodiments of the present application, the housing includes a casing and an annular groove uniformly disposed on an inner wall of the casing in an axial direction of the casing.

In some embodiments of the present application, the annular groove is T-shaped in cross-section.

In some embodiments of this application, be provided with first perpendicular groove on the shells inner wall, first perpendicular groove is followed the axial setting of casing, first perpendicular groove is followed the radial circumference array setting of casing, first perpendicular groove and a plurality of the ring channel intercommunication, the cross-section in first perpendicular groove is the T shape.

In some embodiments of the application, the bottom is the arc design in the casing, is provided with on the inner bottom end of arc design with first perpendicular groove corresponds the second perpendicular groove, the cross-section that the second perpendicular groove is the T shape.

In some embodiments of the present application, the ramp is of a spiral design.

In some embodiments of the present application, a pull rod is inserted into a side of the ramp close to the housing, one end of the pull rod penetrating through the ramp is inserted into the lower filter, and one end of the pull rod far away from the lower filter is in sliding fit with the annular groove and the first vertical groove.

In some embodiments of the present application, a spring is sleeved on a portion of the pull rod inserted into the ramp, one end of the spring abuts against the pull rod, and the other end of the spring abuts against the ramp.

In some embodiments of the present application, the fixed cover in pipeline bottom has connect spacing seat, spacing seat top is the toper design, spacing seat with the cooperation of the interior bottom arc end of casing.

In some embodiments of the present application, a top gripping ring is affixed to the top end of the tubing.

In some embodiments of this application, the rigid coupling has the stopper on the lateral wall of spacing seat, the stopper respectively with first perpendicular groove and the second is perpendicular groove sliding fit.

In some embodiments of the present application, the upper filter sheet is fixedly sleeved on the pipeline.

In some embodiments of the present application, the pull rod and the lower filter sheet correspond one to one.

In some embodiments of the present application, the tie rods and the annular grooves correspond one-to-one.

On the other hand, an embodiment of the present application further provides an ultrapure water filtration system, including an ultrapure water filtration structure described in any one of the above, and:

the pretreatment end comprises a raw water tank, a plate heat exchanger, a preceding stage ultrafiltration, an ultraviolet sterilizer, an active carbon filter and a softener;

the raw water tank is communicated with the plate heat exchanger through a raw water pump, the plate heat exchanger is communicated with a water inlet pipe, a drain pipe is communicated with the preceding stage for ultrafiltration, the preceding stage for ultrafiltration is communicated with the ultraviolet sterilizer, the ultraviolet sterilizer is communicated with the activated carbon filter, and the activated carbon filter is communicated with the softener;

wherein the former water tank plays the cushioning effect to the supply of raw water, plate heat exchanger is used for adjusting the temperature, the preceding stage ultrafiltration is used for further carrying out the physical filtration to the raw water, ultraviolet sterilizer is used for disinfecting to the raw water, the active carbon filter is got rid of with remaining chlorine to total organic carbon of aquatic, the demineralizer is used for hard water softening and prepares deionized water.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

In this process, as the filtration of raw water is performed, although the upper filter disc and the lower filter disc are optimized to reduce the phenomenon of clogging in the disc filter to a certain extent, a certain amount of scale is inevitably generated in the disc filter or a certain clogging phenomenon is generated in the disc filter due to impurities in the raw water, so that the filtration effect of the disc filter gradually decreases.

After long-term use, need clear up or inside filter core to disc filter inside, when changing, only need open the upper cover on shell top, then the ramp, make pull rod displacement on the ramp to first perpendicular groove department, then drag the top snatch the ring, can take out whole filter core and ramp from the casing, then drag the pull rod, take off the ramp from the filter core, can be respectively for inner wall of the housing, ramp and filter core clear up and local change, simple dismantlement, installation design, the effectual use cost that has reduced, and the life of this ultrapure water filtration has been increased.

Although the existing disc filter has little scaling phenomenon, the plate heat exchanger inevitably has certain scale in the disc filter along with the increase of the service time, and the design of the inner structure of the disc filter can further slow down the scale forming speed.

Inside at the raw water entering this disc filter, rivers are from upwards flowing down, under the spiral structure of ramp, rivers will make the ramp rotate, then drive a plurality of lower filter elements and rotate in step, on the contrary, in the back flush, it is same, gush out in rivers wash the pipeline, gush to the ramp behind last filter element and lower filter element, continue to drive the ramp and rotate, then make a plurality of lower filter elements rotate, and the rotation of lower filter element, will make and form relative motion between last filter element and the lower filter element, and rivers then can produce the turbulent flow here, play better impact effect to last filter element and lower filter element, the precipitation phenomenon of calcium magnesium plasma in the raw water has been reduced, then effectively slowed down the formation of incrustation scale.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also derive other related drawings based on these drawings without inventive effort.

FIG. 1 is a schematic view showing the overall structure of an ultrapure water filtration structure according to an embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of a disc filter according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a partial structure of a housing according to an embodiment of the present application;

FIG. 4 is a schematic view of a portion of a filter cartridge according to an embodiment of the present application;

FIG. 5 is a partial structural fit schematic of a ramp and lower filter according to an embodiment of the present application;

FIG. 6 is a schematic view of a first portion of an ultrapure water filtration system according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a second portion of an ultrapure water filtration system according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a third portion of an ultrapure water filtration system according to an embodiment of the present application.

Icon: 1. a water inlet pipe; 11. a back flush valve; 12. a blow-off pipe; 2. a drain pipe; 21. a drain valve; 3. a disc filter; 31. a housing; 311. a housing; 312. an annular groove; 313. a first vertical slot; 314. a second vertical slot; 32. a filter element; 321. a pipeline; 322. an upper filter disc; 323. a lower filter disc; 324. a limiting seat; 325. a top grasping ring; 326. a limiting block; 33. a ramp; 331. a pull rod; 332. a spring.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

As shown in fig. 1-8, an ultrapure water filtration structure according to an embodiment of the present application includes a water inlet pipe 1, a water outlet pipe 2, and a disc filter 3, wherein the water inlet pipe 1 is communicated with a plurality of back flush valves 11, the plurality of back flush valves 11 are communicated with a sewage discharge pipe 12, one end of the water outlet pipe 2 is communicated with a drain valve 21, and the disc filter 3 is communicated with the water outlet pipe 2 and is in one-to-one communication with the back flush valves 11.

Wherein, disc filter 3 contains shell 31, filter element 32 and ramp 33, shell 31 communicates with drain pipe 2 and back flush valve 11 respectively, shell 31 top is provided with the upper cover, the upper cover is provided with discharge valve, filter element 32 contains pipeline 321, go up filter disc 322 and lower filter disc 323, pipeline 321 sets up in shell 31, be provided with a plurality of through-holes on the pipeline 321 lateral wall, go up filter disc 322 cup joints in pipeline 321, go up filter disc 322 and set up along the axial array of pipeline 321, two terminal surfaces all are the toper design at the top of last filter disc 322 bottom, lower filter disc 323 rotates and cup joints in pipeline 321, lower filter disc 323 sets up along the axial array of pipeline 321, and crisscross setting between lower filter disc 323 and the last filter disc 322, the structure size of lower filter disc 323 is identical with last filter disc 322, ramp 33 sets up between shell 31 and filter element 32.

Specifically, the upper filter disc 322 and the lower filter disc 323 are designed by using a plastic filter disc, the upper end surfaces of the upper filter disc 322 and the lower filter disc 323 are respectively designed with a plurality of annular grooves with gradually changing diameters, the lower end surfaces of the upper filter disc 322 and the lower filter disc 323 are respectively designed with a plurality of annular ribs with gradually changing diameters, and the annular grooves and the annular ribs are designed in a staggered manner, so that the annular ribs at the bottom end of the upper filter disc 322 correspond to the annular grooves at the upper end surface of the lower filter disc 323, and the annular grooves with gradually changing diameters and the annular ribs with gradually changing diameters are gradually enlarged inwards from the outer sides of the upper filter disc 322 and the lower filter disc 323, so that the space between the upper filter disc 322 and the lower filter disc 323 forms an open design with a slightly larger outer side, and is more convenient for blocking sundries in raw water.

The operation of an ultrapure water filtration structure and a filtration system according to the embodiments of the present application is described below with reference to the accompanying drawings:

raw water is input into the shell 31 through the water inlet pipe 1 and the back flush valve 11, water flows to the top end of the shell 31 under the action of pressure, then enters the pipeline 321 through gaps between a plurality of groups of upper filter discs 322 and lower filter discs 323 from through holes on the side wall of the pipeline 321, and then is discharged from the water discharge pipe 2, wherein when water flows through the gaps between the upper filter discs 322 and the lower filter discs 323, impurities in the water are blocked under the action of staggered annular grooves and annular ribs, so that the raw water is primarily filtered, and when back flushing is performed, the direction of the water flow is controlled through the back flush valve 11, the raw water enters from the bottom end of the shell 31 and reversely flows to the gaps between the groups of upper filter discs 322 and the lower filter discs 323 through the through holes on the side wall of the pipeline 321, so that the slope 33 is impacted, so that the slope 33 rotates in the shell 31, the lower filter discs are driven to rotate, and at the same time, the water flows to the lower slope 323 after passing through the upper filter discs 322 and the lower filter discs 323, and then flows to the lower filter discs 323 to be discharged from the upper filter discs and the lower filter discs 11 and the sewage discharge pipe 11.

wherein, shell 31 top adopts screw thread mode sealing connection to have the upper cover, is convenient for dismantle or install shell 31 top.

Further, the housing 31 includes a housing 311 and an annular groove 312, and the annular groove 312 is uniformly disposed on the inner wall of the housing 311 along the axial direction of the housing 311.

Wherein the annular groove 312 is T-shaped in cross-section.

Further, a first vertical groove 313 is formed in the inner wall of the shell 311, the first vertical groove 313 is arranged in the axial direction of the shell 311, the first vertical groove 313 is arranged in a radial circumferential array of the shell 311, the first vertical groove 313 is communicated with the plurality of annular grooves 312, and the cross section of the first vertical groove 313 is in a T shape.

Further, the bottom of the housing 311 is designed to be arc-shaped, a second vertical groove 314 corresponding to the first vertical groove 313 is disposed on the inner bottom end of the arc-shaped design, and the cross section of the second vertical groove 314 is T-shaped.

Wherein the ramp 33 is of a spiral design.

Specifically, the outer side wall of the ramp 33 and the inner side wall of the housing 311 are in clearance fit to reduce the friction therebetween.

Furthermore, a pull rod 331 is inserted into a side of the ramp 33 close to the housing 311, an end of the pull rod 331 penetrating through the ramp 33 is inserted into the lower filter disc 323, and an end of the pull rod 331 far away from the lower filter disc 323 is slidably engaged with the annular groove 312 and the first vertical groove 313.

A tension spring 332 is sleeved on a part of the pull rod 331 inserted into the ramp 33, one end of the tension spring 332 abuts against the pull rod 331, and the other end of the tension spring 332 abuts against the ramp 33.

It can be understood that, pulling the pull rod 331 outwards, then sleeving the ramp 33 on the filter element 32, releasing the pull rod 331, and under the action of the tension spring 332, inserting the pull rod 331 onto the lower filter sheet 323 from the side of the ramp 33, it should be noted that, at this time, one end of the pull rod 331 far away from the lower filter sheet 323 is located outside the ramp 33, and then inserting one end of the pull rod 331 protruding from the ramp 33 into the first vertical groove 313 until the bottommost pull rod 331 is displaced to the bottommost annular groove 312, and at this time, the ramp 33 can rotate between the housing 31 and the filter element 32 through the sliding fit of the pull rod 331 and the annular groove 312.

On the other hand, an embodiment of the present application further provides an ultrapure water filtration system, including an ultrapure water filtration structure of any one of the above, and:

the raw water tank is communicated with the plate heat exchanger through a raw water pump, the plate heat exchanger is communicated with the water inlet pipe 1, the drain pipe 2 is communicated with the preceding stage ultrafiltration, the preceding stage ultrafiltration is communicated with the ultraviolet sterilizer, the ultraviolet sterilizer is communicated with the active carbon filter, and the active carbon filter is communicated with the softener;

wherein the former water tank plays the cushioning effect to the supply of raw water, and plate heat exchanger is used for adjusting the temperature, and preceding stage ultrafiltration is used for further carrying out the physics to the raw water and filters, and ultraviolet sterilizer is used for disinfecting to the raw water, and the active carbon filter is got rid of total organic carbon and remaining chlorine in to the aquatic, and the demineralizer is used for hard water softening and prepares deionized water.

It should be noted that when the supply of raw water exceeds the water delivery capacity of the raw water pump, the raw water tank is full, the raw water supply is stopped by the liquid level control of the raw water tank, and when the supply of raw water is less than the water delivery capacity of the raw water pump, the raw water tank is empty, and the raw water pump stops operating, thereby playing a role of protecting the raw water pump.

It should be further noted that the raw water pump is used for pressurizing raw water and providing a power source for the pretreatment end, the pump is controlled by a raw water tank liquid level signal, when the water tank is below a medium liquid level, the raw water pump is automatically started, and when the water tank reaches a high liquid level, the raw water pump automatically stops water source conveying, the site can also be manually operated, a manual butterfly valve is installed at an inlet and an outlet of the raw water pump, and a check valve, a manual butterfly valve, a flow meter and a pressure meter are installed at an outlet of the raw water pump.

It should be further noted that, because the water yield of the ultrafiltration and reverse osmosis membrane in the subsequent process is in direct proportion to the inlet water temperature, meanwhile, the structure of the reverse osmosis membrane can be destroyed when the water inlet temperature is less than 5 ℃, in order to ensure normal and efficient operation of ultrafiltration and reverse osmosis, the water temperature of raw water is required to be adjusted to 20-25 ℃, the water inlet temperature range of the reverse osmosis membrane component is 1-45 ℃, the water yield of a single membrane element reaches a preset value when the water inlet temperature is 25 ℃, on the basis, the water yield is reduced by 2.5-3% when the inlet water temperature is reduced once, a plate heat exchanger is arranged for ensuring the stable water yield of a subsequent membrane treatment system, the water inlet requirement of the reverse osmosis membrane can be maintained, the plate heat exchanger is provided with the bypass pipeline, whether heat exchange and temperature increase are needed or not can be flexibly selected according to actual conditions, the operation cost is reduced, the working principle of the plate heat exchanger is that heat is always transmitted to a low-temperature object from a high-temperature object spontaneously according to the law of thermodynamics, the heat is necessarily transmitted when the two fluids have temperature difference, and the two fluids have temperature difference, in the forced convection heat transfer process, the corrugated structure is adopted on the surface of the heat transfer plate for optimal design, the heat exchange rate reaches 92 percent, even if the flow velocity of the fluid is below a Reynolds standard value, the fluid runs three-dimensionally between the plates, so that the fluid is enabled to form violent turbulence, the thermal resistance of a boundary layer is reduced, and the heat transfer efficiency is enhanced.

It further needs to be explained that this system adopts one set of net produce water to be greater than or equal to 100 m/h, 32 SFP2880 ultrafiltration membranes, the ultrafiltration system of rate of recovery 90% -95%, but system automatic operation and positive and negative washing, wherein, the ultrafiltration device system is simple and go out water quality of water stable, the operating condition is hardly influenced by raw water quality of water change, to the suspended solid of aquatic, metallic oxide, the colloid, macromolecular organic matter, the fungus class all have splendid removal effect, can satisfy reverse osmosis system completely to the requirement of preliminary treatment water quality.

It should be further noted that, the system is provided with 1 ultraviolet sterilizer, the service life of 254nm UV can reach 9000 hours, the sterilization effect reaches 99%, the treatment load is 102m3/h, the power is 583W, and the system has the advantages of strong sterilization capability, high speed, effectiveness on all strains, no need of adding medicaments into water, no change of chemical components of water and the like.

It is further noted that the system adopts a set of 102 m/h phi 3600XH4000mm activated carbon filter for automatic operation and forward backwashing, wherein the filter material is 8-12mm cobblestone, 4.9 tons, 0.3m is filled as a cushion layer, 8-12 meshes and 6.8 tons of filter material high-quality activated carbon are filled as an adsorption layer, the filter material is carbon steel rubber lining, the wall thickness is 10mm, 3 mm of lining 2mm natural rubber is filled, the rubber lining layer extends to an external flange joint surface, the top water distribution device is designed into a funnel shape, the activated carbon is generally replaced once a year, if the pressure in a pipeline is too large or the water flow is unstable in the use process, an exhaust valve can be opened for exhausting, the activated carbon filter is provided with an upper view mirror, the sewage containing condition can be clearly seen, and the backwashing effect can be realized.

It is further noted that in the system, the sodium ion exchanger adopts two carbon steel tanks 1622600X 4000mm, one is used and the other is prepared, the resin of a single tank is filled for 1.5m, the resin adopts Rohm Haas Amberlite IRC120Na, an automatic valve is arranged, automatic operation and regeneration can be realized, the net produced water of a single set of the softener is more than or equal to 100T/H, 2600mm X H4000mm, and the carbon steel lining rubber (the wall thickness is 10mm + the rubber lining is 3+ 2mm), and the system can automatically regenerate at fixed time and fixed flow rate; the operation is stable, the water outlet quality is high, the equipment structure is compact, and the installation occupied area is small; the device belongs to maintenance-free equipment, and does not need to be watched and managed by a specially-assigned person during operation; the operation cost is low: compared with the traditional equipment, the water consumption can be greatly reduced; the automatic regeneration device has the advantages that the automatic regeneration device adopts the online monitoring of the computer, realizes the full-automatic operation of continuous operation and regeneration technology, is free from manual interference in the whole process, and can not lead or lag the operation of the working procedures, and the switching of the working procedures is almost synchronously carried out, so that the whole device is accurate, reliable, efficient, water-saving, salt-saving, power-saving and labor-saving, and the water production cost is extremely low.

As shown in fig. 6 to 8, the raw water pump conveys raw water in the raw water tank to 2 plate heat exchangers, adjusts the temperature of the raw water through the plate heat exchangers, conveys the raw water to the disc filter 3 in the present embodiment, primarily filters the raw water, conveys the raw water to the preceding stage for ultrafiltration UF, effectively removes suspended substances, metal oxides, colloids, macromolecular organic substances, and bacteria in the water, conveys the treated water to the ultraviolet sterilizer, rapidly sterilizes the water without changing the chemical composition of the water, conveys the water to the activated carbon filter for removing the organic substances and reducing residual chlorine in the water, and finally conveys the water to the softener for reducing the hardness of the water and preparing ionized water.

In the related art, the filtration of ultrapure water is often operated for a long time once it is put into use, and in this process, as the filtration work of raw water is performed, although the upper filter disc 322 and the lower filter disc 323 are optimized, the phenomenon of clogging in the disc filter 3 is reduced to a certain extent, in the case of long-term use, a certain amount of scale is inevitably generated in the disc filter 3, or a certain clogging phenomenon is generated therein due to impurities in the raw water, so that the filtration effect of the disc filter 3 is gradually reduced, and at this time, the filter element 32 in the disc filter 3 and the inside of the housing 31 of the disc filter 3 need to be cleaned or replaced, and the conventional disc filter design has a complicated internal structure, and is not convenient to take out the core therein, which causes inconvenience in cleaning or replacing the inside and the components therein of the conventional disc filter, and thus increases the use cost.

According to some embodiments of the present application, as shown in fig. 2 to 5, the bottom end of the pipe 321 is fixedly sleeved with a limiting seat 324, the top end of the limiting seat 324 is designed to be conical, so that sundries can slide down to the outer side of the limiting seat 324, and the limiting seat 324 is matched with the arc-shaped end of the inner bottom of the housing 311 to limit the position of the pipe 321.

Wherein, the top end of the pipe 321 is fixedly connected with a top grabbing ring 325, which is convenient for taking the whole filter element 32.

Furthermore, a limiting block 326 is fixedly connected to the side wall of the limiting seat 324, and the limiting block 326 is in sliding fit with the first vertical groove 313 and the second vertical groove 314 respectively, so that the pipeline 321, the upper filter sheet 322, the lower filter sheet 323 and the ramp 33 are further limited, and the pipeline 321 and the upper filter sheet 322 are prevented from rotating in the shell 311.

From this, after long-term the use, need to clear up or inside filter core 32 to disc filter 3 inside, when changing, only need open the upper cover on shell 31 top, then ramp 33, make pull rod 331 on ramp 33 shift to first vertical slot 313 department, then drag top snatch ring 325, can take out whole filter core 32 and ramp 33 from casing 311, then drag pull rod 331, take down ramp 33 from filter core 32, can be respectively for casing 311 inner wall, ramp 33 and filter core 32 clear up and local change, simple dismantlement, the installation design, the effectual use cost that has reduced, and this ultrapure water filtration structure's life has been increased.

Although the conventional disc filter is rarely scaled, the plate heat exchanger inevitably adjusts the temperature of the raw water as the service life of the disc filter increases, and the disc filter 3 is designed to have an internal structure which further slows down the formation of scale to some extent.

According to some embodiments of the present application, as shown in fig. 2 to 5, the upper filter 322 is fixedly secured to the pipe 321 such that a fixed state is maintained between the upper filter 322 and the pipe 321.

Wherein, the pull rods 331 are in one-to-one correspondence with the lower filter sheets 323, and enhance the connection point between the lower filter sheets 323 and the ramp 33.

Further, the pull rods 331 correspond to the annular grooves 312 one to one.

Therefore, it can be understood that when raw water enters the disc filter 3, water flows from bottom to top, and under the spiral structure of the ramp 33, the ramp 33 is rotated by the water flow, and then the lower filter sheets 323 are driven to rotate synchronously, otherwise, during back washing, the water flows in the water flow flushing pipeline 321 in the same way, and then flows towards the ramp 33 after passing through the upper filter sheet 322 and the lower filter sheets 323, and then the ramp 33 is continuously driven to rotate, so that the lower filter sheets 323 rotate, and the rotation of the lower filter sheets 323 can enable the upper filter sheet 322 and the lower filter sheets 323 to form relative motion, and the water flow can generate turbulence at the moment, so that a better raw water impact effect is achieved on the upper filter sheet 322 and the lower filter sheets 323, the precipitation phenomenon of ions such as calcium, magnesium and the like in the water is reduced, and the formation of scale is effectively slowed down.

It should be noted that the specific model specifications of the backwash valve 11, the drain valve 21 and the tension spring 332 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art, so detailed description is omitted.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides an ultrapure water filtration structure, contains inlet tube (1), drain pipe (2) and disc filter (3), the intercommunication has a plurality of back flush valves (11) on inlet tube (1), and is a plurality of back flush valve (11) communicate in blow off pipe (12), the one end intercommunication of drain pipe (2) has drain valve (21), disc filter (3) communicate in drain pipe (2) and with back flush valve (11) one-to-one intercommunication, its characterized in that:

disc filter (3) contain shell (31), filter core (32) and ramp (33), shell (31) respectively with drain pipe (2) and back flush valve (11) intercommunication, shell (31) top is provided with the upper cover, be provided with discharge valve on the upper cover, filter core (32) contain pipeline (321), go up filter disc (322) and lower filter disc (323), pipeline (321) set up in shell (31), be provided with a plurality of through-holes on pipeline (321) lateral wall, go up filter disc (322) cup joint in pipeline (321), go up filter disc (322) along the axial array setting of pipeline (321), go up filter disc (322) both ends at the bottom of top and all be the toper design, lower filter disc (323) rotate cup joint in pipeline (321), lower filter disc (323) along the axial array setting of pipeline (321), just lower filter disc (323) with set up between filter disc (322), the size of lower filter disc (323) with go up filter disc (322) the crisscross setting, the crisscross structure of lower filter disc (323) with go up between filter disc (31), filter disc (33) and set up between filter disc (31) and filter disc (323).

2. An ultrapure water filtration construction according to claim 1 wherein the top end of the housing (31) is sealingly connected with a top cover in a threaded manner.

3. An ultrapure water filtration structure according to claim 1 wherein the housing (31) comprises a housing (311) and an annular groove (312), the annular groove (312) being uniformly provided on the inner wall of the housing (311) in the axial direction of the housing (311).

4. An ultrapure water filtration construction according to claim 3, characterized in that the annular groove (312) is T-shaped in cross-section.

5. An ultrapure water filtration structure according to claim 3, wherein a first vertical groove (313) is provided on the inner wall of the housing (311), the first vertical groove (313) is provided along the axial direction of the housing (311), the first vertical groove (313) is provided along the radial circumferential array of the housing (311), the first vertical groove (313) communicates with the plurality of annular grooves (312), and the first vertical groove (313) has a T-shaped cross section.

6. An ultrapure water filtration structure according to claim 5, characterized in that the housing (311) is of an arc design at its inner bottom, and that a second vertical groove (314) corresponding to the first vertical groove (313) is provided at the inner bottom end of the arc design, the second vertical groove (314) having a T-shaped cross-section.

7. An ultrapure water filtration construction according to claim 1, characterized in that the ramp (33) is of helical design.

8. An ultrapure water filtering construction according to claim 6, wherein a pull rod (331) is inserted into the side of said ramp (33) close to said housing (311), said pull rod (331) being inserted through one end of said ramp (33) to said lower filter disc (323), an end of said pull rod (331) remote from said lower filter disc (323) being in sliding engagement with said annular groove (312) and said first vertical groove (313).

9. The ultrapure water filtering structure according to claim 8, wherein a spring (332) is sleeved on a portion of the pull rod (331) inserted into the ramp (33), one end of the spring (332) abuts against the pull rod (331), and the other end of the spring (332) abuts against the ramp (33).

10. An ultrapure water filtration system comprising the ultrapure water filtration structure of any one of claims 1 to 9, and:

the raw water tank is communicated with the plate heat exchanger through a raw water pump, the plate heat exchanger is communicated with a water inlet pipe (1), a drain pipe (2) is communicated with the preceding stage for ultrafiltration, the preceding stage for ultrafiltration is communicated with the ultraviolet sterilizer, the ultraviolet sterilizer is communicated with the activated carbon filter, and the activated carbon filter is communicated with the softener;